Yes, you're right. I used Array#shift with the input array, that's a bad thing.

Copying solved the issue. Thanks!

You are altering the list used by the test. Try to work on a copy or to not use destructive operation like python's pop.

Same issue, in Ruby. The kata is impossible to finish with these errors on testing.

Testig for Leon McNichol, Galatea, Sylia Stingray, Anri
It should work for random inputs too -  Expected: "Sylia Stingray and Anri like this", instead got: "Leon McNichol, Galatea and 2 others like this"

Looks like random test examples shift two first elements from the array. It's currently impossible to complete this kata, you either have basic test passing and random failed or none at all after hacking.
Also 'Testig' is misspelled.

Please, fix the tests!